A fully automatic flux constant pressure spraying device for dip welding machine

Abstract

This utility model discloses a fully automatic flux constant pressure spraying device for a dip soldering machine, comprising a frame body with an open top. A slide rail is provided on the top of the side plate, and a PCB board that moves left and right is mounted on the top of the slide rail. A spraying box and a spraying component are fixedly connected at the bottom. The spraying component includes a protective shell on the bottom plate inside the frame body, and a flux container is located inside the protective shell. This fully automatic flux constant pressure spraying device for a dip soldering machine, through the arrangement of the frame body, slide rail, and spraying box, allows the PCB board to move on the slide rail. The drive component inside the spraying box moves the spray nozzle, eliminating the need for manual hand-held spraying tools. It automates the flux spraying of PCB boards, greatly improving production efficiency and is suitable for large-scale PCB batch production needs in the electronics manufacturing industry, effectively solving the problem that existing manual spraying is unsuitable for mass production.

Description

Technical Field

[0001] This utility model relates to the field of dip welding machines, specifically a fully automatic dip welding machine flux constant pressure spraying device. Background Technology

[0002] In the field of electronics manufacturing, fully automatic dip soldering machines are the core equipment for large-scale PCB board soldering. The main function of flux is to remove oxides from the PCB board surface, reduce the surface tension of the solder, and enhance the wettability of the solder and the surface of the metal being soldered, thereby ensuring the reliability of the solder joint.

[0003] In the prior art, when removing oxides from the surface of a PCB board, a small spray bottle or spray gun is usually used to evenly spray flux onto the PCB board surface. The operator needs to hold the spraying tool and carefully cover each part that needs to be soldered to ensure that the flux can fully contact the oxides. This method is convenient for removing oxides from the surface of a single PCB board, but it is not suitable for mass production.

[0004] In view of this, a fully automatic flux constant pressure spraying device for dip welding machine is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fully automatic flux constant pressure spraying device for dip welding machines, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a fully automatic flux constant pressure spraying device for dip soldering machine, comprising a frame body, the top of the frame body being open, a slide rail being provided on the top of the side plate, a PCB board being provided on the top of the slide rail moving from left to right, and a spraying box being fixedly connected to the bottom. The sprayed part includes a protective shell disposed on the bottom plate inside the frame body. The protective shell contains a flux tank. The top of the flux tank is provided with a connector. A constant pressure air inlet pipe and a liquid outlet pipe are provided on the surface of the connector. The air inlet end of the constant pressure air inlet pipe is connected to an external air compressor. The air outlet end extends to the inside of the flux tank through a pipe. A pressure gauge is provided on the side of the right horizontal plate of the protective shell. The output end of the pressure gauge extends to the inside of the horizontal plate and is connected to the constant pressure air inlet pipe. An adjustment ring for use with the pressure gauge is provided on the top of the horizontal plate. The movable component includes a slider inside the slide rail of the bottom plate of the spray box, a nozzle on the top of the slider, and the outlet end of the liquid outlet pipe extending into the interior of the spray box and connecting to the nozzle. A drive component for moving the slider is provided at the bottom of the front of the spray box.

[0007] This utility model has the following beneficial effects: This fully automatic flux constant pressure spraying device for dip soldering machines, through the setting of a frame, slide rail and spray box, allows the PCB board to move on the slide rail. With the drive component in the spray box driving the nozzle to move, no manual operation of hand spraying tools is required. It can realize the automation of flux spraying on PCB boards, which greatly improves production efficiency. It is suitable for the large-scale PCB board mass production needs in the electronics manufacturing field and effectively solves the problem that existing manual spraying is not suitable for mass production. This fully automatic flux constant pressure spraying device for a dip soldering machine utilizes a constant pressure air inlet pipe connected to an external air compressor to provide stable air pressure to the flux container. Simultaneously, a pressure gauge monitors the air pressure in the container in real time, and an adjusting ring regulates the pressure to ensure the flux is sprayed from the nozzle at a constant pressure. This stable spraying pressure not only ensures consistent flux application, avoiding uneven spraying caused by unstable pressure, but also effectively removes oxides from the PCB board surface, reduces solder surface tension, and enhances the wettability of the solder to the surface of the metal being soldered, thereby improving the reliability of the solder joint. This fully automatic flux constant pressure spraying device for dip welding machines features a handle on the top of the flux tank for easy handling and replacement by staff. The mounting components at the bottom of the protective shell, through the cooperation of the mounting plate and sliding rod, facilitate the installation and disassembly of the protective shell, providing convenience for equipment maintenance and repair. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the protective shell of this utility model installed inside the frame. Figure 2 This is a schematic diagram of the spray head structure inside the spray box of this utility model; Figure 3 This is a schematic diagram of the flux container of this utility model installed inside the protective shell; Figure 4 This is a cross-sectional structural diagram of the connector of this utility model; Figure 5 This is a schematic diagram of the connection structure between the nozzle and the lead screw of this utility model; Figure 6 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0009] The components are as follows: 1. Frame; 2. Slide rail; 3. PCB board; 4. Spraying box; 5. Protective shell; 6. Flux bucket; 7. Constant pressure air inlet pipe; 8. Liquid outlet pipe; 9. Pressure gauge; 10. Adjusting ring; 11. Slider; 12. Spray nozzle; 13. Motor; 14. Lead screw; 15. Handle; 16. Mounting plate. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Please see Figures 1 to 6 This utility model provides a fully automatic flux constant pressure spraying device for a dip soldering machine; it includes a frame body 1, the top of the frame body 1 is open, a slide rail 2 is provided on the top of the side plate, a PCB board 3 that moves from left to right is provided on the top of the slide rail 2, and a spraying box 4 is fixedly connected to the bottom. The sprayed part includes a protective shell 5 located on the bottom plate inside the frame 1. The protective shell 5 has a flux tank 6 inside. The top of the flux tank 6 has a connector. A constant pressure air inlet pipe 7 and a liquid outlet pipe 8 are provided on the surface of the connector. The air inlet end of the constant pressure air inlet pipe 7 is connected to an external air compressor, and the air outlet end extends into the inside of the flux tank 6 through a pipe. A pressure gauge 9 is provided on the side of the right horizontal plate of the protective shell 5. The output end of the pressure gauge 9 extends into the interior of the horizontal plate and is connected to the constant pressure air inlet pipe 7. An adjustment ring 10 is provided at the top of the horizontal plate to cooperate with the pressure gauge 9. The air inlet pressure of the constant pressure air inlet pipe 7 can be adjusted by the adjustment ring 10 to ensure that the flux is sprayed out at a constant pressure. like Figure 3 As shown, the constant pressure air inlet pipe 7 passes through the inside of the right horizontal plate of the protective shell 5, and the air inlet end a is connected to the external air compressor equipment to facilitate continuous pumping of air into the inside of the flux tank 6. The liquid outlet end of the liquid outlet pipe 8 also passes through the inside of the horizontal plate to maintain the stability of the connection.

[0012] The connector has an internal cavity corresponding to the constant pressure air inlet pipe 7 and the liquid outlet pipe 8. The surface of the flux container 6 has a liquid inlet for easy replenishment of flux. A sealing cap is provided on the surface of the liquid inlet, and a sealing gasket is provided at the part of the sealing cap that contacts the liquid inlet to prevent air leakage when pumping air into the inside of the flux container 6.

[0013] The movable component, the bottom plate slide of the spray box 4, is equipped with a slider 11. A nozzle 12 is provided on the top of the slider 11. The bottom of the nozzle 12 is connected to the slider 11 by a screw for easy disassembly and maintenance. The outlet end of the liquid outlet pipe 8 extends into the interior of the spray box 4 and is connected to the nozzle 12. The bottom of the front of the spray box 4 is equipped with a driving component for moving the slider 11. The driving component includes a motor 13 fixedly connected to the bottom of the front of the spray box 4. The output end of the motor 13 is fixedly connected to a lead screw 14. The lead screw 14 is located in the slide, and the other end is located on the side wall of the spray box 4. The bottom end of the slider 11 is threadedly connected to the surface of the lead screw 14.

[0014] The flux sprayed from the nozzle 12 is in a fan shape. When the PCB board 3 slides along the slide rail 2 and passes above the spray box 4, the switch controls the equipment to be turned on. The sprayed flux is evenly sprayed onto the surface of the PCB board 3, thereby removing the oxides on its surface and facilitating the subsequent dip soldering process.

[0015] The motor 13 drives the lead screw 14 to rotate. The lead screw 14 is threadedly connected to the slider 11, which can precisely control the movement trajectory, speed and position of the slider 11 and the nozzle 12. This allows the nozzle 12 to spray flux evenly and accurately on the surface of the PCB board 3, avoiding the problems of uneven and inaccurate manual spraying and ensuring the quality of welding.

[0016] The flux container 6 is provided with a handle 15 on the top for easy hand replacement of the flux container 6. The bottom of the protective shell 5 is provided with a mounting component, which includes a mounting plate 16 at the bottom of the protective shell 5. The upper surface of the mounting plate 16 is provided with a mounting groove. The lower surface of the bottom plate of the protective shell 5 is provided with a sliding rod that matches the mounting groove and extends into the interior of the mounting groove. The side of the right horizontal plate of the protective shell 5 is provided with a switch, which is electrically connected to the pressure gauge 9 and the motor 13 for controlling the operating status of the equipment. The mounting plate 16 has an auxiliary plate (not shown in the figure) that can be compressed up and down on the inner bottom wall of the mounting groove. A compression spring (not shown in the figure) is provided between the bottom of the auxiliary plate and the inner bottom wall of the mounting plate 16. When the protective shell 5 is fastened to the inside of the mounting groove by the sliding rod, it slides to the left. Under the action of the compression spring and the auxiliary plate, it can press against the protective shell 5 to reduce the possibility of loosening. The mounting plate 16 can be pre-fixed to the inner bottom wall of the frame 1 by bolts, which also facilitates disassembly and maintenance later.

[0017] The horizontal switch on the right side of the protective shell 5 is electrically connected to the pressure gauge 9 and the motor 13, which simplifies the operation process. Operators can easily control the equipment's operating status through the switch, reducing the difficulty of operation.

[0018] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0019] In this invention, the working steps of the device are as follows: When in use, turn on the switch on the right side of the protective shell 5, start the external air compressor and the motor 13 of the device, confirm that the pressure gauge 9 shows that the pressure is stable, the motor 13 drives the screw 14 to rotate normally, and the nozzle 12 begins to move and be adjusted. According to the size of PCB board 3 and the spraying requirements, the speed of motor 13 is adjusted to control the moving speed and spraying range of nozzle 12. When PCB board 3 moves on slide rail 2 to the top of spraying box 4, flux is evenly sprayed from nozzle 12 through liquid outlet pipe 8 under the stable air pressure of constant pressure air inlet pipe 7 to spray the surface of PCB board 3 in a comprehensive manner, ensuring that each soldering part is covered with flux. After completing the spraying of PCB board 3, turn off the switch on the right horizontal plate of the protective shell 5 to stop the operation of the external air compressor and motor 13.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automatic flux constant pressure spraying device for a dip welding machine, characterized in that: Includes a frame body (1), the top of the frame body (1) is open, a slide rail (2) is provided on the top of the side plate, a PCB board (3) that moves from left to right is provided on the top of the slide rail (2), and a spray box (4) is fixedly connected to the bottom. The sprayed part includes a protective shell (5) on the bottom plate inside the frame body (1). The protective shell (5) has a flux tank (6) inside. The flux tank (6) has a connector on the top. A constant pressure air inlet pipe (7) and a liquid outlet pipe (8) are provided on the surface of the connector. The air inlet end of the constant pressure air inlet pipe (7) is connected to an external air compressor. The air outlet end extends to the inside of the flux tank (6) through a pipe. A pressure gauge (9) is provided on the side of the right horizontal plate of the protective shell (5). The output end of the pressure gauge (9) extends to the inside of the horizontal plate and is connected to the constant pressure air inlet pipe (7). An adjustment ring (10) is provided on the top of the horizontal plate to cooperate with the pressure gauge (9). The movable component is provided with a slider (11) inside the bottom slide of the spray box (4), and a nozzle (12) is provided on the top of the slider (11). The liquid outlet end of the liquid outlet pipe (8) extends into the interior of the spray box (4) and is connected to the nozzle (12). The bottom of the front of the spray box (4) is provided with a driving component to drive the slider (11) to move.

2. The fully automatic flux constant pressure spraying device for dip welding machine according to claim 1, characterized in that: The connector has a cavity inside that corresponds to the constant pressure air inlet pipe (7) and the liquid outlet pipe (8). The flux barrel (6) has a liquid inlet on its surface and a sealing cap on the surface of the liquid inlet.

3. The fully automatic flux constant pressure spraying device for dip welding machine according to claim 2, characterized in that: The driving component includes a motor (13) fixedly connected to the bottom front of the spray box (4). The output end of the motor (13) is fixedly connected to a lead screw (14). The lead screw (14) is located in the slide rail, and the other end is located on the side wall of the spray box (4). The bottom end of the slider (11) is threadedly connected to the surface of the lead screw (14).

4. The fully automatic flux constant pressure spraying device for dip welding machine according to claim 3, characterized in that: The flux container (6) has a handle (15) on top and a mounting piece on the bottom of the protective shell (5).

5. The fully automatic flux constant pressure spraying device for dip welding machine according to claim 4, characterized in that: The mounting component includes a mounting plate (16) located at the bottom of the protective shell (5), with a mounting groove on the upper surface of the mounting plate (16), and a sliding rod adapted to the mounting groove on the lower surface of the bottom plate of the protective shell (5) extending into the interior of the mounting groove.

6. The fully automatic flux constant pressure spraying device for dip welding machine according to claim 5, characterized in that: A switch is provided on the side of the right horizontal plate of the protective shell (5), and is electrically connected to the pressure gauge (9) and the motor (13) to control the operating status of the equipment.

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